Table 2 Mean concentrations of ETEs in drinking water samples (unit: μg/L)

Baida Township (n = 1)

0.189

0.370

0.041

1.252

0.354

0.665

Dalong Township (n = 5)

0.256 ± 0.100

0.897 ± 0.222

0.040 ± 0.025

1.693 ± 1.636

0.198 ± 0.138

0.919 ± 0.701

Exi Township (n = 7)

0.183 ± 0.172

0.706 ± 0.368

0.038 ± 0.017

0.088 ± 0.008

0.088 ± 0.067

0.614 ± 0.290

Kangsha Township (n = 14)

0.200 ± 0.176

0.514 ± 0.744

0.091 ± 0.107

0.175 ± 0.164

0.085 ± 0.077

0.468 ± 0.246

Najiu Township (n = 20)

0.128 ± 0.091

0.688 ± 0.647

0.034 ± 0.023

0.652 ± 0.628

0.035 ± 0.023

0.392 ± 0.196

Mali Township (n = 7)

0.206 ± 0.100

0.384 ± 0.206

0.054 ± 0.024

0.432 ± 0.354

0.303 ± 0.130

0.932 ± 0.961

Shuodu Township (n = 5)

2.672 ± 2.239

0.264 ± 0.139

1.370 ± 2.288

0.219 ± 0.286

0.074 ± 0.066

1.965 ± 2.135

Xinrong Township (n = 7)

0.198 ± 0.146

0.963 ± 0.825

0.075 ± 0.071

0.105 ± 0.004

0.336 ± 0.295

0.850 ± 0.431

Yuxi Township (n = 5)

0.141 ± 0.074

0.215 ± 0.088

0.058 ± 0.050

0.273 ± 0.070

0.308 ± 0.146

0.560 ± 0.501

Zhongyi Township (n = 6)

0.747 ± 0.279

1.070 ± 0.287

0.452 ± 0.591

0.083 ± 0.078

0.149 ± 0.207

2.114 ± 2.780

Zituo Township (n = 12)

0.270 ± 0.279

4.871 ± 8.230

0.075 ± 0.088

0.491 ± 0.658

0.066 ± 0.049

3.311 ± 4.777

Luolong County (n = 89)

0.278 ± 0.264

0.766 ± 0.312

0.411 ± 0.526

0.119 ± 0.223

0.155 ± 0.180

0.804 ± 1.112

GB 5749–2022

1000

300

100

70

10

1000